CN2137849Y - Two-reliable soft start graded transition flushing device - Google Patents

Abstract

The utility model relates to a flashing device used on an aviation obstruction lamp, which is characterized in that the utility model comprises a low-voltage trapezoidal generator 1, a first photoelectric coupling isolator 5, a first high-voltage trapezoidal generator 6, a bridge rectifier 7 and a flashing device 8, wherein, the low-voltage trapezoidal generator 1 generates trapezoidal wave. The first high-voltage trapezoidal generator 6 modulates controllable silicon according to signals output by the first photoelectric coupling isolator 5 and makes outer outline lines output by the silicon controlled rectifier become trapezoidal wave. The bridge rectifier 7 rectifies signals output by the first high-voltage trapezoidal generator 6; the flashing device 8 is used for receiving signals output by the bridge rectifier 7. The utility model enables the service life of the flashing device to be prolonged for numbers of times, and is capable of being used on the obstruction lamp for a long term without replacing.

Description

Two-reliable soft start graded transition flushing device

The utility model relates to the flasher of the generation trapezoidal wave voltage that uses on a kind of aviation obstruction beacon.

Aviation obstruction beacon of the prior art flickers with about 2 seconds frequency in order to make it, usually to bulb provider wave voltage, because square wave is very big to the impulse current that filament produces, filament is blown very soon.

The purpose of this utility model is to provide a kind of flasher that can prolong bulb service life significantly.

The purpose of this utility model can realize by following technical proposal:

The utility model comprises a low pressure staircase generator that produces trapezoidal wave; An input is connected on first optocoupler isolator of low pressure staircase generator output; Signal according to the output of first optocoupler isolator is modulated controllable silicon and made controllable silicon output outer contour is the first high pressure staircase generator of trapezoidal wave; The bridge rectifier that the signal of first high pressure staircase generator output is carried out rectification; A flasher that is used to accept the bridge rectifier output signal.The low pressure staircase generator is used to produce a low pressure trapezoidal wave, and first optocoupler isolator is used to isolate the high-pressure section of low-pressure section and back level.The first high pressure staircase generator mainly comprises thyristor gating circuit part and SCR rectification circuit part, the thyristor gating circuit part produces the trigger impulse of control controllable silicon conducting according to the signal of first optocoupler isolator output, this trigger impulse is added in silicon controlled control and extremely goes up, make controllable silicon have the different angles of flow, thereby behind SCR rectification circuit and bridge rectifier, the voltage signal that to obtain an outer contour be trapezoidal wave, the high level of this voltage signal is about 200 volts, low level is about 30 volts, and it can make bulb alternately flicker after delivering to flasher.

For realizing the purpose of this utility model, can also further adopt following technical proposal:

The utility model also comprises one second optocoupler isolator; Signal according to the output of second optocoupler isolator is modulated controllable silicon and made controllable silicon output outer contour is the second high pressure staircase generator of trapezoidal wave; The detector arrangement accepting the direct current signal of described first high pressure staircase generator output and produce a distinguishing signal; A commutation circuit, described distinguishing signal connects the control end of commutation circuit to control its corresponding contact action, make the input of output termination bridge rectifier of output, the second high pressure staircase generator of the input termination low pressure staircase generator of second optocoupler isolator, and cut off the input signal of first optocoupler isolator, the output signal of the first high pressure staircase generator.Second optocoupler isolator and the second high pressure staircase generator are stand-by circuits, after the main circuit of being made up of first optocoupler isolator and the first high pressure staircase generator breaks down, the signal of first high pressure staircase generator output no longer is trapezoidal wave but is bordering on the signal of direct current, at this moment, flasher is normal bright or often go out, and detector arrangement can detect this direct current signal and control the commutation circuit action stand-by circuit is put into operation.

The utility model compared with prior art has following advantage:

1). because what be added to filament on the bulb is the trapezoidal wave voltage signal, wave form varies is slow, so the impulse current on the filament is little, can improve the useful life of filament.

2). the cold-state resistance of filament is 1/14th under the rated voltage, these characteristics according to filament, the low level that adds to the trapezoidal wave signal on the filament is about 30 volts, even make when bulb is dark, filament also is febrile state, thereby keep filament that a bigger resistance is arranged, reduce the rush of current that the rising edge of trapezoidal wave brings to filament, the useful life that can improve filament.

3). because the existence of bridge rectifier makes that the trapezoidal wave voltage high level of bridge rectifier output only is about 200 volts,, can prolong bulb life greatly less than 10% of rated voltage, but very unobvious to the brightness influence of bulb.

Accompanying drawing 1 is a circuit block diagram of the present utility model;

Accompanying drawing 2 is the circuit theory diagrams of a kind of embodiment of the present utility model;

Accompanying drawing 3 is the A part enlarged drawing of accompanying drawing 2;

Accompanying drawing 4 is the B part enlarged drawing of accompanying drawing 2;

Referring to accompanying drawing 2, the low pressure staircase generator is made up of by 324 integrated package 15 and peripheral resistance and electric capacity model, wherein variable resistor 14 is used to regulate trapezoidal wave frequency, and variable resistor 17 is used to regulate the amplitude of trapezoidal wave, and variable resistor 16 is used to regulate the gradient of trapezoidal wave.24 is first optocoupler isolator, and its model is 4N25, and variable resistor 18 is as 24 light-emitting diode current-limiting resistance.Commutation circuit 3 comprises relay coil 12, relay contact 23, relay contact 50.When relay coil 12 when electric, corresponding contact 23 switches to a-c by a-b, contact 50 switches to a1-c1 by a1-b1, makes and cuts off main circuit, drops into stand-by circuit.On first optocoupler isolator 24 241 is first pin of this device, and 242 is second pin of this device, and 244 is the 4th pin of this device, and 245 is the 5th pin of this device.With diode 25,26,27,28, electric capacity 30, bidirectional diode 29 is the main thyristor gating circuit of forming, with bidirectional triode thyristor 31 is the main SCR rectification circuit part of forming, and described thyristor gating circuit and SCR rectification circuit form the first high pressure staircase generator.Because trapeziodal voltage is added in 241,242 two ends, 244,245 two ends can obtain resistance and be the resistance that trapezoidal wave changes; N, L two ends add 220 volts alternating voltage, so behind 25,26,27,28 bridge rectifiers, 220 volts of AC power can be periodically to electric capacity 30 chargings, and bidirectional diode 29 just conducting when the voltage drop at the two poles of the earth surpasses 30 volts, cause electric capacity 30 discharges, thereby for the control utmost point of bidirectional triode thyristor 31 provides the conducting trigger voltage, bidirectional triode thyristor 31 exportable outer contours are the voltage signal of trapezoidal wave, after serving as the main bridge rectifier of forming, can be the voltage signal of trapezoidal wave with diode 45,46,47,48 to flasher (bulb 49) output mean value.By the resistance of adjustment potentiometer 14,16,17, the trapezoidal wave waveform of scalable low pressure staircase generator 1 output, thus the conducting phase place of bidirectional triode thyristor 31 is changed, and then change the voltage waveform of the first high pressure staircase generator, 6 outputs.Stand-by circuit is identical with the composition of main circuit, and 32 is second optocoupler isolator, and its model is 4N25, on second optocoupler isolator 32 321 is first pin of this device, 322 is second pin of this device, and 324 is the 4th pin of this device, and 325 is the 5th pin of this device.With diode 33,34,35,36, electric capacity 37, bidirectional diode 38 is the main thyristor gating circuit of forming, with bidirectional triode thyristor 39 is the main SCR rectification circuit part of forming, and thyristor gating circuit and SCR rectification circuit form the second high pressure staircase generator.The second high pressure staircase generator is identical with the operation principle of the first high pressure staircase generator.Detector arrangement comprises: model is that the optocoupler isolator 44 of 4N25, bridge rectifier, the switch integrated package 22(model of being made up of diode 40,41,42,43 are 8778), a comparator in the integrated package 15.During the main circuit operate as normal, the outer contour of bidirectional triode thyristor 31 output ripples is the signal of trapezoidal wave, through diode 40,41,42, delivering to optocoupler isolator 44(model behind 43 bridge rectifiers is 4N25) input (first pin 441, second pin 442), the output of optocoupler isolator 44 (the 5th pin 445, the 4th pin 444) signal of telecommunication of an interchange of output, because AC signal can be passed through electric capacity 21, so 22 the 5th pin 225 can obtain the signal of telecommunication of an alternation, (22 is the switch integrated package to first pin 221 of control 22 with the short circuit of "-" utmost point periodically with alternating signal, 225 are the control utmost point), thereby make electric capacity 20 charging and discharging constantly, and electric capacity 20 is because the charging interval weak point, always can not reach the value (resistance 18 of comparative voltage, the voltage of 19 series connection back resistance 19), so 14 pins (12 pins of 15 of 15,13 pins, 14 pins are as the output and the output pin of comparator) output low level, the base stage of triode 13 also is a low level, and relay coil 12 must not.When the signal of bidirectional triode thyristor 31 outputs is direct current signal, bulb is normal bright or normal dark, this shows that main circuit breaks down, this moment, 444 ends obtained direct current signal, this signal can not pass through electric capacity 21,221 no longer with the short circuit of "-" utmost point, electric capacity 20 can be recharged until the voltage that surpasses 15 13 pins, the output of the comparator in 15--the 14 pin output high level, triode 13 carries out power amplification, and relay coil 12 gets electric, contact 23,50 actions, main circuit is switched, drop into stand-by circuit work.

Claims (2)

1, the gradual flasher of a kind of soft start is characterized in that: it comprises a low pressure staircase generator 1 that produces trapezoidal wave; An input is connected on first optocoupler isolator 5 of low pressure staircase generator 1 output; Signal according to 5 outputs of first optocoupler isolator is modulated controllable silicon and made controllable silicon output outer contour is the first high pressure staircase generator 6 of trapezoidal wave; The bridge rectifier 7 that the signal of the first high pressure staircase generator, 6 outputs is carried out rectification; A flasher 8 that is used to accept bridge rectifier 6 output signals.

2, the gradual flasher of soft start according to claim 1 is characterized in that: it also comprises one second optocoupler isolator 3; Signal according to 3 outputs of second optocoupler isolator is modulated controllable silicon and made controllable silicon output outer contour is the second high pressure staircase generator 4 of trapezoidal wave; The detector arrangement 9 accepting the direct current signal of the described first high pressure staircase generator 6 outputs and produce a distinguishing signal; A commutation circuit 2, described distinguishing signal connects the control end of commutation circuit 2 to control its corresponding contact action, make the input of output termination bridge rectifier 7 of output, the second high pressure staircase generator 4 of the input termination low pressure staircase generator 1 of second optocoupler isolator 3, and cut off the input signal of first optocoupler isolator 5, the output signal of the first high pressure staircase generator 6.

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